Fixing element_test on Safari.

Fixing element_test on Safari.

I changed computedStyle to getComputedStyle, but forgot this location.

But this test was not in a group, which with the individual config should have made the test not execute. But on Safari it's failing all of the element_test tests.

Odd thing is that it's not failing on the rest of the browsers.

Also adding a small delay for the setTimeout case as IE appears to be optimizing the 0 condition (in some cases).

TBR
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=17683

[Emily Fortuna, 2013-01-28 22:59:52]

Hmm. That seems worrisome with the tests failing on Safari even though they
shouldn't have been run.... If you get a chance, file an issue on me and I'll
investigate.

lgtm.